Machine for grinding mosaic flooring.



.'No. 835,631. ,PATENTED NOV. 13, 1906. W. H. MOON'EY, J. E. PEIRGE 6aT. H. MOONEY.

MACHINE POR GRINDING MOSAIC PLOOING.

APPLICATION FILED NOV. 13. 1905.

3 SHEETS-SHEET 1.

No. 835,631. PATENTBD NOV. 13, 1906.

W. H. MOONEY', J. E. PBIRGE & T. H. MOONEY.

MACHINE FOR GRINDING MOSAIC FLOORING.

APPLICATION FILED EOV.13. 1905.

8 SHEETS-SHEET 2.

Wi hmmm 'WILLiAn n. Moonen JOHN 'ing at Unirnn -l earns PATENT einen.

Entier .Pn-inca, AND: THOMAS n.1 Moonen l or DAYTON. onio.A J maestriaveen emanan@ Mosaic Feoonme.

No. senesi.

Epeefication of LetterslPatent.

Patented. Nov. is, ieee.

.application filed November 18,1905.. Serial No. 287,042.

To mi?, whom. t may concern..-`

Be it known that we, WILLIAM H. Moonnr, JOHN ELLIOT Person, and THOMASH;

MooNnY, citizens ofthe UnitedStates, resid- Dayton, in the county ofMontgomery and State of (Ehio, have invented certain new and usefulimprovements in' Machines for Grinding yMosaic Flooring; and we dodeclare the iollowingtobe a full, clear, and exact description ci theinvention,` such as will enable others skilled in the art to which itappertains to malte and use the same, reference being had to theaccompanying drawings, and to the iigures of reference marked thereon,which form a part of this specification.

This invention relates te a machine ier levelin or grinding to a tinesurface mosaic or marcie ooring or tiling.

The object of the invention is to" provide means whereby the laborincidental to this class of work is greatly curtailed, as hereinafterdescribed and claimed. Preceding a detail description of the inventionreference is made to the accompanyingpdrawings, of whichligure ,1 is-atop plan view oi the grindingmachine. Fig. 2is a side elevation. Fig. 3is a vertical sectional view through the frame or the forward portion ofthe frame, illustrating the grinding mechanism.

n a detail description ci the invention similar reference charactersindicate corresponding parts. i

The machine is movable by hand over the iloor during its grindingoperation and for this purpose consists of a truck 1, supported onground-wheels2 and having an extended bracket 3, which vforms a bearingdior the shaft 5 of the motel' 6, said motor being suit"- ably securedin position on the truck. The motor-shaft 5 drives the cone-shaped gear7 which en ages a crown-gear 8 on -vertica shaft 9, t e said shaft beingsupported in bearings l()l on the bracket or arm 3. The shaft 9 hasrigidly secured to it a cone-shaped pulley 11 which is in rictionalcontact with and drives a number of similar pulleys 12, assembled aroundit. These latter pulleys are mounted upon shaft 13 and are maintained intheir relative positions by iitting in uplper and lower bearing platesor yokes 14, w ch project from a sleeve 15, that loosely surrounds thecentral shaft 9 and is held in position thereon by upper and lowercollars 16.

In order that the pulleys 12 may be allowed to have compensatingmovement consequent upon the Wear or grinding effect, there is permitteda certain amount of up-and-down movement of the shafts 13 Within saidyoke la. The extent of this movement is indicated by the space betweenthe uV per surface of the yoke and the nuts or col arsv 17. Supported onthe lower ends of the shafts 13 by means of universal couplings 18 aregrinders 19, consisting of disks With a iiat grinding-surface whichcomes in contact with the surface .of the mosaic or marble flooring. Intheir operations these disks revolve on their' own vaires-to wit, theshafts 13-and they travel around the shaft 9, thuh having two movements,one upon their own axes and one upon the central shaft of the machine,both movements being simultaneous. enabled to travel in a circle aroundthe shaft 9 while revolving upon their own axes hy a stationary ring 20which is secured to the frame ofthe trucli and has a tapering inner Theyare surface 21, which engages the peripheries of the pulleys 12, thetapering surface Oi said ring allowing compensation for wear. it willthus be seen that the pulleys 12 are Jrictionally engaged on op ositesides by this ring 20 and the driving-pu ley 1l on the center shaft 9.

Having described our invention, We claim claim* f 1. lIn a machine ofthe type speciiied, a plurality of grinders revolving individuallyaround a common center, a ulley adapted to simultaneously revolve eacgrinder upon its own axis, and a stationary ring frictionally engagingthe Aouter sides of revolving pulleys.

2. ln a machine for grinding flooring, a stationary ring, adriving-pulley mounted Within said ring, a plurality of driven Wheelsmounted between said drivingpulley and engaged on their outer sides bysaid stationary ring, a plurality of grinders, and` universe connectionsbetween each grinder and its respective drivin -wheel.

3. In a machine for grin g mosaic loorin a central driving-Wheel, aseries of tapere friction-Wheels driven by said central driving-Wheel, astationary ring having its inner surface parallel with the taperedwheels and engaging the outer surfaces of said tapered wheelsha seriesof grindingmosaic Wheels mounted upon the shafts' of said l taperedWheels, and a universal coupling connecting each of said grinding-WheelsWith each of said shafts.

4. In a machine for grinding mosaic flooring, the combination with amotor, of a central driving-Wheel geared to said motor, a stationaryring surrounding said central driving- Wheel, a plurality of drivenWheels engaged at opposite points by said central driving-Wheel and saidring, a plurality lof shafts upon which said driven Wheels are mounted,upper and lower yokes in Which said shaftsl are loosely mounted andenabled' to 4have vertical compensating movement, a'sleeve surroundingthe shaft of the central driving- Wheel and to Whichsaid yokes arerigidly lined, a plurality of grinders, and universal couplings by whichsaid grinders are connected with the shafts ofthe driven wheels.

In testimony whereof We affix our signatures in presence ol tWoWitnesses.

WILLIAM H. MOONEY. JOHN ELLIOT PEIRCE. THOMAS H. MOONEY.

Witnesses:

C. M. THEOBALD, RL J. lVI'CGAnJrY;r

